﻿//  ----------------------------------------------------------------------------------
//  Copyright Microsoft Corporation
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  http://www.apache.org/licenses/LICENSE-2.0
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//  ----------------------------------------------------------------------------------
#nullable enable
namespace DurableTask.AzureStorage.Http
{
    using System;
    using System.Threading.Tasks;
    using Azure.Core;
    using Azure.Core.Pipeline;
    using DurableTask.AzureStorage.Monitoring;

    sealed class MonitoringHttpPipelinePolicy : HttpPipelinePolicy
    {
        readonly AzureStorageOrchestrationServiceStats stats;

        public MonitoringHttpPipelinePolicy(AzureStorageOrchestrationServiceStats stats)
        {
            this.stats = stats ?? throw new ArgumentNullException(nameof(stats));
        }

        public override void Process(HttpMessage message, ReadOnlyMemory<HttpPipelinePolicy> pipeline)
        {
            this.stats.StorageRequests.Increment();
            ProcessNext(message, pipeline);
        }

        public override ValueTask ProcessAsync(HttpMessage message, ReadOnlyMemory<HttpPipelinePolicy> pipeline)
        {
            this.stats.StorageRequests.Increment();
            return ProcessNextAsync(message, pipeline);
        }
    }
}
